Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

Copper and titanium are each used with aluminium to make alloys which are light, strong and resistant to corrosion. Aluminium, $Al$, is in the third p...

2009 Summer

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

(a) Complete the electronic configuration of aluminium and of titanium, proton number 22.\[\begin{array}{|c|c|} \hline \text{Al} & 1s^2 \\ \hline \tex...

2009 Summer

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

You are provided with the following.FA 1 is 0.15 mol dm$^{-3}$ sodium thiosulfate, Na$_2$S$_2$O$_3$.FA 2 is aqueous copper(II) sulfate.You are also pr...

2009 Summer

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

You are to investigate how the rate of formation of sulfur varies with the concentration of sodium thiosulfate, Na₂S₂O₃, in the reaction below.N...

2009 Summer

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

(a) Carry out the following tests. Record your observations in the spaces provided in the table.[Table_1]To 1 cm depth of solution in a test-tube add ...

2009 Summer

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

You are provided with the following.FB 1 is 0.023 mol dm−3 potassium manganate(VII), KMnO4.FB 2 is aqueous ethanedioic acid, H2C2O4, made by dissolv...

2009 Summer

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

(a) Reaction of FB 4, Na2CO3, with an excess of 3.0 mol dm^-3 hydrochloric acidRead through the following instructions carefully before starting the e...

2009 Summer

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

FB 6 and FB 7 each contain one of the following sodium halides, NaCl, NaBr, NaI. (a) Place half of the solid FB 6 provided in a test-tube. Half fill t...

2009 Summer

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

Metals play a vital part in biochemical systems. In this question you need to consider why some metals are essential to life, whilst others are toxic....

2009 Summer

Theory

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

(a) Spider silk is a natural polymer which has an exceptional strength for its weight. *Kevlar* is a man-made polymer designed to have similar propert...

2009 Summer

MCQ

CH8 - REACTION KINETICS

The diagram shows a Boltzmann distribution of molecular energies for a gaseous mixture. The distribution has a peak, labelled P on the diagram. What h...

2015 Summer

MCQ

CH3 - CHEMICAL BONDING

Which quantity gives the best indication of the relative strengths of the hydrogen bonds between the molecules in liquid hydrogen halides?

2015 Summer

MCQ

CH1 - ATOMS, MOLECULES & STOICHIOMETRY

Use of the Data Booklet is relevant to this question.1.00 g of carbon is combusted in a limited supply of pure oxygen. 0.50 g of the carbon combusts t...

2015 Summer

MCQ

CH6 - ELECTROCHEMISTRY

In oxygen difluoride, $\text{OF}_2$, fluorine has an oxidation number of $-1$. $\text{OF}_2$ will react with sulfur dioxide according to the following...

2015 Summer

MCQ

CH4 - STATES OF MATTER

Use of the Data Booklet is relevant to this question.The gas laws can be summarised in the ideal gas equation below.$pV = nRT$0.96 g of oxygen gas is ...

2015 Summer

MCQ

CH7 - EQUILIBRIA

One mole of phosphorus(V) chloride, $\text{PCl}_5$, is heated to 600 K in a sealed flask of volume 1 dm$^3$. Equilibrium is established and measuremen...

2015 Summer

MCQ

CH5 - CHEMICAL ENERGETICS

The standard enthalpy changes of combustion of glucose and ethanol are given as −2820 and −1368 kJ molˉ¹ respectively.Glucose, C$_6$H$_{12}$O$_6...

2015 Summer

MCQ

CH7 - EQUILIBRIA

In which reaction is the underlined substance acting as a base? A. $\text{HNO}_3 + \underline{\text{H}_2\text{SO}_4} \rightarrow \text{H}_2\text{NO}_...

2015 Summer

MCQ

CH7 - EQUILIBRIA

One molecule of haemoglobin, Hb, can bind with four molecules of oxygen according to the following equation. $$\text{Hb(aq)} + 4\text{O}_2\text{(aq)}...

2015 Summer

MCQ

CH3 - CHEMICAL BONDING

The double bond between the two carbon atoms in an ethene molecule consists of one \( \sigma \) bond and one \( \pi \) bond.Which orbitals overlap to ...

2015 Summer